1、八年级英语下册 Lesson25 Lets Do an Experiment教案 冀教版Lesson25: Lets Do an Experiment!Step1：复习巩固、激情导入复习：提问unit3重点词组和句型导入：Do you like to do experiment? What experiment have you done?Step2：出示目标、明确任务1.牢记本课黑体词汇：science/experiment/fill/prove/scientific/method等；2.能分角色表演对话；3.背诵重点句子1-5，并灵活运用相关知识点。Step3：自主学习、合作探究任务一：限
2、时5分钟，熟读所有词汇，牢记黑体词汇任务二：熟读对话，把握其意，画出不理解处，同桌之间交流任务三：背诵重点句子，并自学知识点，画出不理解处，同桌之间交流1.I fill a jar with water.2.I turn the jar upside down.3.Im sure the floor wont get wet.4.We can prove whos right.5.Well do the experiment and observe what will happen.Step4：师生互动、展示提升互动一：单词记忆比赛互动二：对话熟读接力赛互动三：知识点展示大比拼知识点一：I f
3、ill a jar with water.fill.with.意为“ 用.装满. ” be filled with.=be full of.意为 “充满.”fill in. 意为“ 填上.;填充.”Eg: On hearing the news, her eyes are filled with tears. They filled the hole with water.Fill in the blanks.知识点二： I turn the jar upside down.Turnupside down意为“把翻转/倒过来”upside down 意为“正面朝下”right side up意
4、为“正面朝上”Eg: That picture is upside down. You hold the book upside down.知识点三：Im sure the floor wont get wet.be sure （that）从句,意为“肯定，确定”主句的主语必须是人 否定形式是be not sure+疑问词引导的从句.Eg: Tom is sure that he will win the game.Tom is not sure whether he can win the game.Im not sure when hell come here.知识点四：We can pr
5、ove whos right.prove是及物动词,意为“证明,证实”常用于以下结构:prove sth.(to sb.);prove(to sb.)that.;prove.(to be)+adj/n.Eg： The fact has proved the mans honesty to us all.=The fact has proved to us all that the man is honest.=The fact has proved the man (to be) honest.prove也可以作不及物动词,意为吧“证明表明(自己)是.”后跟形容词或名词.Eg： My theo
6、ry will prove right some day.During the trip,he proved a man with a strong will.知识点五： Well do the experiment and observe what will happen.(1)observe是动词,意为 “观察”observe sb. do sth.observe sb.doing sth.用法同see/watch/hear等Eg: I observed her dance.When I passed by the grass,I observed him walking.（2）happe
7、n vi 意为“发生”【固定短语】sth happens to sb（无被动语态） Happen to do sth Eg: What has happened to you？I happened to meet an old friend yesterday.Step5：巩固练习、检测验收教学反思：课时32Lesson26: One Wet Danny?Step1：复习巩固、激情导入复习：提问Lesson25知识点1-5导入：Why is Danny going to wear his swimsuit?Step2：出示目标、明确任务1.牢记本课黑体词汇：force等；2.能分角色表演对话；
8、3.背诵重点句子1-4，并灵活运用相关知识点。Step3：自主学习、合作探究任务一：限时2分钟，熟读所有词汇，牢记黑体词汇任务二：熟读对话，把握其意，画出不理解处，同桌之间交流任务三：背诵重点句子，并自学知识点，画出不理解处，同桌之间交流1.Brian，Jenny and Danny are talking about their experiment.2.The force of the air will keep the water in the jar.3.Brian will turn the jar over.4.I will ask the class to make observ
9、ations and guess what will happen.Step4：师生互动、展示提升互动一：单词记忆比赛互动二：能分角色表演对话互动三：知识点展示大比拼知识点一：Brian，Jenny and Danny are talking about their experiment.【固定词组】talk about 意为“谈论”talk to sb 意为“对某人说”talk with sb意为“和某人谈论”知识点二：The force of the air will keep the water in the jar.Force n 力量、武力、暴力Eg：The force of hum
10、an is great. V 迫使、强迫【固定词组】force sb to do sth = force sb into doing sth 意为“强迫某人做某事”Eg：Nobody can force me to do anything.知识点三：Brian will turn the jar over.【固定词组】turn over 意为“翻过来”（over为副词）Over短语：come over (to) 到来 Go over 复习 Get over 恢复 Look over 检查Eg：We do hope the people in Sichuan will soon get over
11、 their trouble.知识点四：I will ask the class to make observations and guess what will happen.【固定词组】（1）Ask sb (not)to do sth 要求某人（不要）做某事类似用法：tell/invite /want/teach/force(2)make observations 意为“观察”Step5：巩固练习、检测验收教学反思：课时33Lesson27: Danny the “Dry-o-Saur”!Step1：复习巩固、激情导入复习：提问Lesson26知识点1-4导入：In the experim
12、ent, will Danny get wet？Step2：出示目标、明确任务1.牢记本课词汇：surprised/examine/discover/explain/enough/liquid/solid/2.spoon/add/mix/pour；3.熟读课文，把握其意；4.背诵重点句子1-4，并灵活运用相关知识点。Step3：自主学习、合作探究任务一：限时1分钟，牢记词汇任务二：熟读两封邮件，把握其意，画出不理解处，同桌之间交流任务三：背诵重点句子，并自学知识点，画出不理解处，同桌之间交流1.Next, Brian will take his hand off the cardboard.2
13、.The force is strong enough to hold the water.3.Air is stronger than I thought!4.Put eight spoonfuls of cornstarch into the bowl.Step4：师生互动、展示提升互动一：熟读邮件比赛互动二：课文熟读接力赛互动三：知识点展示大比拼知识点一：Next,Brian will take his hand off the cardboard.take sth. off sth.意为“使某物离开或脱离.”Eg：Would you mind taking your foot off
14、my hand?take off还意为“ 起飞;脱下;匆忙离去”Eg：The plane took off at 7 a.m. Take off your shoes,please.He took off for the station in a hurry.知识点二：The force is strong enough to hold the water.Adj/adv+enough to do sth 意为“是 足够.以至于能做某事”Eg： The boy is old enough to go to school.=The boy is so old that he can go to
15、school.=He is such an old boy that he can go to school.enough作副词,要放在被修饰的形容词和副词之后;作形容词,通常放在被修饰的名词前或之后.Eg: This hall is large enough to hold two thousand people.He walks fast enough to be here in time.He doesnt have enough money to go for traveling.Im soory,but I havent enough time to do the job.知识点三：
16、Air is stronger than I thought!than可作连词或介词,用于引入比较级的后半部分,表示 比.;Eg： She is a better player than she was last year.He is taller than me.He gets up earlier than I(do).rather than意思是 宁愿.,不愿.;与其.不如. Eg： I would rather stay at home than go out.知识点四：Put eight spoonfuls of cornstarch into the bowl.spoonful是可
17、数名词,意思是 一勺的量.Eg：a spoonful of sugar.类似的还有 two cupfuls of milk; a few mouthfuls of tea; a handful of flowersStep5：巩固练习、检测验收教学反思：课时34Lesson28: Fill My PlateStep1：复习巩固、激情导入复习：提问Lesson27知识点1-4导入：Do you like the song ?Step2：出示目标、明确任务1.牢记本课黑体词汇：plate/taste/empty/full等；2.听录音1-3遍，能跟唱歌曲；3.背诵重点句子1-2，并灵活运用相关知识
18、点。Step3：自主学习、合作探究任务一：限时3分钟，熟读所有词汇，牢记黑体词汇任务二：听录音，跟唱歌曲，比一比，赛一赛，看哪组唱的最好任务三：背诵重点句子，并自学知识点，画出不理解处，同桌之间交流1.That tastes so great.2.And I will eat until my plate is empty.Step4：师生互动、展示提升互动一：单词记忆比赛互动二：跟唱歌曲比赛互动三：知识点展示大比拼知识点一：That tastes so great.Taste（1）作系动词,后接形容词作表语,意为“ 尝起来”Eg： The meat tastes good.（2）做实义动词，
19、意为“品尝、体验”Eg：Would you like to taste the cheese? I made myself.知识点二：And I will eat until my plate is empty.Empty (1) a 空的Eg：I need an empty box. （2）v 倒空Eg：I have emptied a drawer for you to use.Step5：巩固练习、检测验收教学反思：课时35Lesson29: An Easter Egg HuntStep1：复习巩固、激情导入复习：唱Lesson28歌曲导入：When is Easter, do you
20、know? And how do people celebrate Easter?Step2：出示目标、明确任务1.牢记本课黑体词汇：basket/hide/hen等；2.熟读课文，把握其意；3.背诵重点句子1-3，并灵活运用相关知识点。Step3：自主学习、合作探究任务一：限时3分钟，熟读所有词汇，牢记黑体词汇任务二：熟读课文，把握其意，画出不理解处，同桌之间交流任务三：背诵重点句子，并自学知识点，画出不理解处，同桌之间交流1.When you “hunt”for sth, you will find it!2.Debbie will have fun looking for them.3.
21、Now my basket is full of eggs.Step4：师生互动、展示提升互动一：单词记忆比赛互动二：课文熟读接力赛互动三：知识点展示大比拼知识点一：When you “hunt” for sth, you will find it！【固定句型】find,look for,find out,hunt forfind强调找的结果 意为“找到”Eg：He found his lost pen.look for 强调动作的过程 意为“寻找”Eg：He is looking for his lost pen.find out 强调(经过一番努力之后)找到.;查明.Eg：At last,
22、 they found out who stole the bike.hunt for sb.sth.意为“寻找某人或某物”与look for同义. Eg：The police are hunting for the thief.知识点二：Debbie will have fun looking for them.have fun相当于enjoy oneself意为“玩得高兴,过得愉快” Eg：We had lots of fun on the sportsground today.=We enjoyed ourselves very much on the sportsground toda
23、y.have fun doing sth.表示 做某事有乐趣.It is(not) fun to dodoing sth.=There is muchno fun in doing sth.意为“做.有(无)乐趣”Eg：It is fun to cook a meal myself.=Theres much fun in cooking a meal myself.There is not much fun in going to a party alone.=Its not fun to go to a party along.知识点三：Now my basket is full of eg
24、gs.be full of.意为“充满”=be filled with.Eg：The bus is full of people.=The bus is filled with people.Step5：巩固练习、检测验收教学反思：课时36Lesson30: Keep the Candle Burning!Step1：复习巩固、激情导入复习：提问Lesson29知识点1-3导入： Do you think science is interesting? Why or why not?Step2：出示目标、明确任务1.牢记本课黑体词汇：match/light/burn/use up等；2.熟读课
25、文，把握其意；3.背诵重点句子1-4，并灵活运用相关知识点。Step3：自主学习、合作探究任务一：限时5分钟，熟读所有词汇，牢记黑体词汇任务二：熟读课文，把握其意，画出不理解处，同桌之间交流任务三：背诵重点句子，并自学知识点，画出不理解处，同桌之间交流1.Fill the dish half full of water.2.To make a candle burn, you light it.3.As the candle burns, it uses up oxygen in the air.4.There is about one-fifth oxygen in the air, so
26、the water rises and fills about one-fifth of the jar.1.The candleholder is holding the candle.Step4：师生互动、展示提升互动一：单词记忆比赛互动二：课文熟读接力赛互动三：知识点展示大比拼知识点一：Fill the dish half full of water.Half（1）副词意为“部分地,一半地,差不多”Eg：The bottle is only half full.（2）也可作形容词,名词,意为“半个的,一半的,一半”Eg：half a year=a half year; half an h
27、our=a half hour; Half of them are already here. Two halves make a whole.知识点二：To make a candle burn, you light it.Make/let/have sth./sb. do sth.意为“使某物或某人做某事”Eg： Let the candle burn for two or three minutes.知识点三：As the candle burns,it uses up oxygen in the air.1)as作连词的各种用法as.as.结构中第二个as是连词,它往往连接一个不完整的
28、句子,表示比较,意思是 和.一样.;像.一样. ”Eg：John is as healthy as his sister.表示方式,意为“像,按照,如同. ”Eg：Run as I do.Leave it as it is.表示时间, 意为“当.的时候,一边.一边.,随着”Eg： She sang as she worked.I saw him as he was getting off the bus.You will grow wiser as you grow older.表示原因, 意为“因为”Eg：As you are tired,you bad better rest.表示让步,
29、意为“虽然,尽管”Eg：Rich as he is ,he is not happy.Much as I like it,I will not buy it.2)use sth. up意为“ 用尽.,利用. ”Eg：She used up the chicken bones to make soup.When the candle stops burning,it has used up all the oxygen in the air.知识点四：There is about one-fifth oxygen in the air,so the water rises and fills a
30、bout one-fifth of the jar.分数的表达形式:分子用基数词,分母用序数词,分子大于1,分母加s.概括为口诀:分子基,分母序.分子1,分母加s. ”Eg：1/2=one/a half=one second=one-second;1/3=one third=one-third;2/3=two thirds=two-thirds;1/4=one/a quarter=one-quarter;3/4=three quarters=three-quarters;3/5=three fifths=three-fifths;知识点五：The candleholder is holding the candle.hold为动词意为“拿,抓,握,抱,保持,容纳”Eg： Shall I hold your bag?He held a book in his hand.He held his head up.I dont think the car will hold you all.Step5：巩固练习、检测验收教学反思：课时37Lesson31: Surprise Your Friends!
